VETUS M4.56 52HP Marine Diesel Propulsion Engine

Description

At 52 HP and 3000 RPM, the VETUS M4.56 is an inline four-cylinder, four-stroke vertical marine diesel engine with 1.758 L displacement. This naturally aspirated engine uses indirect fuel injection with a mechanical governor pump system and specifies marine diesel meeting EN 590 or ASTM D975 No. 2-D. Its indirect fresh-water cooling loop, intercooled top-cover plate, and raw-water heat exchanger define the stated cooling arrangement.

The listed dry weight is 192 kg, while the 12V, 110-amp alternator supports the charging system. This engine has an M-Line analogue dashboard wiring-harness interface, and NMEA 2000 availability is specified through an external VETUS gateway. The provided application information identifies auxiliary inboard propulsion use for 22 to 36 foot hulls, including cruising sailboats, sloops, catamarans, canal boats, and traditional wooden day-boats.

Key Specifications of the VETUS M4.56 Marine Diesel Propulsion Engine

• The inline four-cylinder vertical diesel engine displaces 1.758 L, establishing a compact marine propulsion configuration with four-stroke operation.
• Output is rated at 52 HP, or 38.3 kW at the crankshaft, at a specified full-throttle speed of 3000 RPM.
• Naturally aspirated induction pairs with indirect fuel injection and a mechanical governor pump system for the stated fuel-delivery arrangement.
• The indirect fresh-water cooling loop incorporates an intercooled top-cover plate and raw-water heat exchanger, defining the listed thermal-management system.
• A 12V, 110-amp alternator supplies the specified charging output, requiring appropriate electrical-system planning within the vessel installation.
• The analogue dashboard wiring harness supports the M-Line interface, while NMEA 2000 requires the separately specified external VETUS gateway.
• Dry weight is 192 kg, providing a stated mass for evaluating engine beds, lifting capacity, and vessel trim considerations.

Engine Controls and Cooling

The M4.56 uses a mechanical-governor indirect-injection system and carries a 22.0:1 compression ratio. Its 78.0 mm x 92.0 mm bore-and-stroke dimensions and naturally aspirated layout distinguish it from a turbocharged engine configuration. The 110-amp alternator and analogue dashboard harness should be matched with the vessel’s planned instrumentation and charging connections.

For a VETUS marine diesel engine installation, the fresh-water cooling loop and raw-water heat exchanger require proper hose routing, sea-water supply components, and service access. NMEA 2000 integration is not inherent to the listed analogue interface, so an external VETUS gateway is required where that network connection is part of the vessel system.

Why Choose the VETUS M4.56 Marine Diesel Propulsion Engine

The M4.56 marine diesel propulsion engine combines 52 HP at 3000 RPM with a 1.758 L inline four-cylinder arrangement and naturally aspirated induction. Buyers can compare its 192 kg listed dry weight, 110-amp alternator, indirect fresh-water cooling, analogue dashboard interface, and external-gateway NMEA 2000 option against other inboard engines. The stated application range covers auxiliary propulsion installations on specified 22 to 36 foot hulls.

Installation and Service Considerations

Confirm engine-bed capacity, clearance, transmission selection, propeller-shaft alignment, and exhaust-system requirements for the intended inboard installation. Route fresh-water and raw-water cooling connections according to VETUS documentation, and plan access to the heat exchanger and engine-service points. For digital network integration, include the external VETUS gateway required for the listed NMEA 2000 capability.

Warranty and Support

VETUS provides its 5 PLUS engine warranty program, consisting of 36 months of coverage for material and construction defects for eligible non-commercial pleasure-craft use, plus a subsequent 24-month limited coverage period for specified engine parts, subject to applicable operating-hour limits and warranty conditions. Mulmarine.com can assist with product details and order-related questions before purchase. Please review the warranty coverage and eligibility details on Mulmarine.com before purchase.

Before Ordering the VETUS M4.56 Marine Diesel Propulsion Engine

Verify that your vessel supports the 192 kg dry weight, 52 HP at 3000 RPM output, 1.758 L inline four-cylinder configuration, and indirect cooling layout. You should confirm the planned transmission and shaft arrangement, raw-water and fresh-water hose routes, exhaust routing, 12V charging connections, dashboard-harness requirements, and whether your installation requires the external VETUS NMEA 2000 gateway.